Nodejs Array Equal equals(arr)

Method Source Code

Array.prototype.equals = function(arr) {
   var len = arr.length;
   if (this.length !== len) {
      return false;
   }/*from   w  w w .  j a va 2  s . c  o  m*/

   for (var i = 0; i < len;i ++) {
      if (this[i] !== arr[i]) {
         return false;
      }
   }

   return true;
};


var arr = [1, 2, 3];
var arr2 = [1, 2, 3];

var bol = arr.equals(arr2);
console.log(bol); // true

Related

1. equalTo(compareTo)

   Array.prototype.equalTo = function(compareTo) {
     if (this.length !== compareTo.length) {
       return false;
     for(var i = 0; i < compareTo.length; i++) {
       if (this[i] !== compareTo[i]) {
         return false;
     return true;
   };
   

2. equals(arr)

   Array.prototype.equals = function (arr) {
     const len = this.length
     if (len !== arr.length) {
       return false
     for (let i = 0; i < len; i++) {
       if (this[i] !== arr[i]) {
         return false
     return true
   const a = [1, 2].equals([1, 2]) 
   const b = [1, 2].equals([0]) 
   console.log(a, b)
   

3. equals(arr)

   Array.prototype.equals = function(arr) {
     const len = this.length
     if (len !== arr.length) {
       return false
     for (let i = 0; i < len; i++) {
       if (this[i] !== arr[i]) {
         console.log(222,this[i])
         return false
   ...
   

4. equals(arr)

   "use strict";
   var pairToCoords = function pairToCoords(pair) {
     return { x: pair[0], y: pair[1] };
   };
   var coordsToPair = function coordsToPair(coords) {
     return [coords.x, coords.y];
   };
   coordsToPair(pairToCoords([1, 2])); 
   pairToCoords(coordsToPair({ x: 1, y: 2 })); 
   ...
   

5. equals(arr)

   Array.prototype.equals = function (arr) {
     if (this.length != arr.length) return false;
     return this.reduce(function (acc, el, i) {
     if (_.isArray(el)) return acc && el.equals(arr[i]);
     return acc && el === arr[i];
   }, true)};